elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Parametric Design Studies of the Helicopter Rotor Noise using Variable-Fidelity Methods

Rabe, Dirk and Wilke, Gunther Andreas (2018) Parametric Design Studies of the Helicopter Rotor Noise using Variable-Fidelity Methods. 74th American Helicopter Society, 14. - 17.5.2018, USA, Arizona, Phoenix.

[img] PDF
8MB

Abstract

The current trend is to produce even quieter helicopters in order to increase public acceptance. While the ERATO and the from it evolved Blue Edge blade show that noise reduction can be achieved through a specific blade design; the task to arrive at such a design is lengthy. It roughly took 25 years from the wind tunnel campaign to the now flying H160 with this type of rotor design. In order to speed up the design process, it is necessary to quickly and accurately assess the quality of a given design. While a wide range of tools exists to predict rotorcraft noise, the validity as well as the accuracy per computational cost has not been fully evaluated. Recent CFD simulations are able to replicate the BVI noise event, yet are very costly in contrast to wake coupled comprehensive codes. This paper seeks the best method that fulfills the trade-off between speed and accuracy. Therefore, three different rotor wind tunnel models in descent flight are computed with six different ethods. Afterwards, a selection of these methods is utilized in a parametric study to further see how well the different methods can identify the best blade design. The most favored method is a panel method coupled with a free wake model including structural modelling from a comprehensive code, while CFD is recommended only to check the final design due to its high computational cost.

Item URL in elib:https://elib.dlr.de/125009/
Document Type:Conference or Workshop Item (Speech)
Title:Parametric Design Studies of the Helicopter Rotor Noise using Variable-Fidelity Methods
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rabe, Dirkdirk.rabe (at) dlr.deUNSPECIFIED
Wilke, Gunther AndreasGunther.Wilke (at) dlr.dehttps://orcid.org/0000-0002-1915-5307
Date:May 2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Aeroacoustics, Variable Fidelity Methods, Helicopter, CFD, HOST, UPM
Event Title:74th American Helicopter Society
Event Location:USA, Arizona, Phoenix
Event Type:international Conference
Event Dates:14. - 17.5.2018
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - VicToria
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, BS
Deposited By: Rabe, Dirk
Deposited On:14 Dec 2018 13:53
Last Modified:31 Jul 2019 20:22

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.